Step 1:
The first step to converting 12650.638509211 to a fraction is to re-write 12650.638509211 in the form p/q where p and q are both positive integers. To start with, 12650.638509211 can be written as simply 12650.638509211/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 12650.638509211, which in this case is 9. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 12650.638509211/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 12650.638509211/1 each by 1000000000:
Step 3:
Now the last step is to simplify the fraction (if possible) by finding similar factors and cancelling them out, which leads to the following answer for 12650.638509211 as a fraction:
139157/11 / 1